CF7 action integration

gistfile1.txt

add_action( 'wpcf7_before_send_mail', 'my_activtrail_cf7_integration' );
function my_activtrail_cf7_integration( $cf7 ) {
	$form_id = $_POST['_wpcf7'];
 	if ($form_id == XXX || $form_id == YYY):
 		$first_name = $_POST['first_name']; // get form data
    ...
 		// Do Something;
	endif;
}